Free Inventions and Discoveries MCQs with Answers

• A. 7
• B. 8
• C. 6
• D. 9

Explanation: A visible spectrum is traditionally described as seven colours: red, orange, yellow, green, blue, indigo and violet.

• A. Karachi
• B. Lahore
• C. Multan
• D. Islamabad

Explanation: Karachi is commonly cited in Pakistani general-knowledge references as the location of Pakistan’s first radio station after independence.

• A. Apple
• B. Google
• C. Yahoo
• D. Oracle

Explanation: Steve Jobs co-founded Apple Computer with Steve Wozniak and Ronald Wayne in 1976. Google, Yahoo and Oracle were founded by different people.

• A. Enamel
• B. Nail
• C. Bone
• D. N.O.T

Explanation: Tooth enamel is the body's hardest substance because its mineral content is higher than that of bone or nails.

• A. Silver iodide
• B. Silver nitrate
• C. Silver chloride
• D. Silver nitrite

Explanation: Silver iodide provides tiny particles around which supercooled water droplets can form ice, helping stimulate rainfall in cloud seeding.

• A. 1560s
• B. 1570s
• C. 1783s
• D. 1470s

Explanation: The first recorded practical parachute descent was made by Louis-Sébastien Lenormand in 1783.

• A. 1586
• B. 1286
• C. 1386
• D. 1486Subscribing To Online Reference Libraries

Explanation: The earliest spectacles are generally traced to Italy in the late 13th century, around 1286.

• A. Samuel Cohen
• B. Narinder Kapany
• C. Percy L.Spencer
• D. T.H. MaimahA

Explanation: Narinder Singh Kapany pioneered the development of optical fibre and is often called the “father of fibre optics.” The other names are…

• A. The performance of the child is below average.
• B. The performance of the child is above average.
• C. The mental age of the child is equal to his actual age.
• D. The performance of the child cannot be better.

Explanation: In the traditional IQ formula, IQ equals mental age divided by chronological age multiplied by 100.

• A. 1885-1886
• B. 1887-1888
• C. 1888-1889
• D. 1889-1890

Explanation: Karl Benz developed the first practical petrol-driven automobile, the Benz Patent-Motorwagen, in 1885 and patented it in 1886.

• A. USA
• B. UK
• C. France
• D. Germany

Explanation: Albert Einstein was born in Ulm, in the German Empire, in 1879, so Germany is the correct country.

• A. Tomato
• B. Red Ball
• C. Union
• D. Love Apple

Explanation: Love apple was an old European name for the tomato, reflecting historical beliefs about its supposed aphrodisiac qualities.

• A. Chromium waves
• B. Heat waves
• C. Gravitational waves
• D. sedenctary waves

Explanation: LIGO detects ripples in spacetime called gravitational waves, produced by violent events such as merging black holes.

• A. Philo taylor
• B. Motorola martia
• C. Robert
• D. Guglielmo marconi

Explanation: Guglielmo Marconi is widely credited with developing the first successful practical radio telegraphy system and demonstrating wireless…

• A. China
• B. Japan
• C. US
• D. France

Explanation: France opened the Wattway project in 2016, widely described as the world’s first photovoltaic road.

• A. Dr. Riaz Rehman
• B. Pro.Abdul Salam
• C. Prof.Muhammad Younas
• D. Muhammad Salman Rashad

Explanation: Bangladeshi economist Muhammad Yunus founded Grameen Bank, which pioneered collateral-free microcredit for poor borrowers.

• A. Chester Carlson
• B. Petrache Poenaru
• C. Johannes Gutenberg
• D. Laszlo Biro

Explanation: László Bíró is credited with inventing the modern ballpoint pen and received a patent for its practical design in 1938.

• A. USA
• B. GERMANY
• C. SWITZERLAND
• D. CHINA

Explanation: China leads the world in solar-power capacity and generation, supported by its large-scale photovoltaic manufacturing and deployment.

• A. China
• B. Srilanka
• C. Saudi Arabia
• D. India

Explanation: Saudi Arabia granted citizenship to Sophia, a humanoid robot developed by Hanson Robotics, in 2017.

• A. England
• B. Turkey
• C. China
• D. Norway

Explanation: China is credited with introducing paper money during the Song dynasty, centuries before modern European banknotes.